EP 1167726 A3 20031217 - Air-fuel ratio control apparatus of internal combustion engine
Title (en)
Air-fuel ratio control apparatus of internal combustion engine
Title (de)
Vorrichtung zur Steuerung des Luft/Kraftstoffsgemisches einer Brennkraftmaschine
Title (fr)
Dispositif de contrôle du rapport air/carburant d'un moteur à combustion interne
Publication
Application
Priority
JP 2000191677 A 20000626
Abstract (en)
[origin: EP1167726A2] An air-fuel ratio control apparatus of an internal combustion engine according to the present invention is provided with oxygen storage amount estimating means, downstream exhaust air-fuel ratio detecting means, maximum oxygen storage amount estimating means, and air-fuel ratio target setting means. The oxygen storage amount estimating means estimates an oxygen storage amount of an exhaust purifying catalyst, based on a history of an oxygen adsorption/desorption amount of the exhaust purifying catalyst located on an exhaust path. The downstream exhaust air-fuel ratio detecting means is located downstream of the exhaust purifying catalyst and detects an exhaust air-fuel ratio downstream of the exhaust purifying catalyst. The maximum oxygen storage amount estimating means estimates a maximum oxygen storage amount, based on an oxygen storage amount estimate when the exhaust air-fuel ratio detected is a predetermined air-fuel ratio. This permits effective utilization of oxygen occlusion capability of the exhaust purifying catalyst and improvement in exhaust purification performance. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 45/00 (2006.01); B01D 53/86 (2006.01); F01N 3/20 (2006.01); F01N 3/24 (2006.01); F02D 41/02 (2006.01); F02D 41/04 (2006.01); F02D 41/14 (2006.01)
CPC (source: EP US)
F01N 11/007 (2013.01 - EP US); F02D 41/0295 (2013.01 - EP US); F02D 41/047 (2013.01 - EP US); F02D 41/1441 (2013.01 - EP US); F02D 41/1456 (2013.01 - EP US); F02D 2041/1422 (2013.01 - EP US); F02D 2200/0814 (2013.01 - EP US); F02D 2200/0816 (2013.01 - EP US); Y02T 10/40 (2013.01 - EP US)
Citation (search report)
- [X] US 5609023 A 19970311 - KATOH AKIRA [JP], et al
- [A] US 5842340 A 19981201 - BUSH KEVIN J [US], et al
- [A] US 5901552 A 19990511 - SCHNAIBEL EBERHARD [DE], et al
- [A] US 5293740 A 19940315 - HEPPNER BERND [DE], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1167726 A2 20020102; EP 1167726 A3 20031217; EP 1167726 B1 20050817; DE 60112663 D1 20050922; DE 60112663 T2 20060614; JP 2002004930 A 20020109; JP 3680217 B2 20050810; US 2002011068 A1 20020131; US 2002194840 A1 20021226; US 6481201 B2 20021119; US 6901744 B2 20050607
DOCDB simple family (application)
EP 01115293 A 20010625; DE 60112663 T 20010625; JP 2000191677 A 20000626; US 21210502 A 20020806; US 88002901 A 20010614